what is organismal theory?state its postulates
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.THEORY
The Organismal Theory. The counter argument to the cell theory developed during the later part of the C19th. Reichert a morphologist: Argued that an organism has a structured plan. Strasberger a cytologist: Cells are connected in an organism sometimes by cytoplasmic bridges (plant cell plasmodesmata).
POSTULATES
The generally accepted parts of modern cell theory include: All known living things are made up of one or more cells. All living cells arise from pre-existing cells by division. The cell is the fundamental unit of structure and function in all living organisms.Cell theory was originally given by German botanist Matthias Schleiden & German physiologist Theodor Schwann together based on their researches in 1838 & 1839 respectively. This theory proposed the hypothesis that all living bodies are composed of 1 or many cells.
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The organismal theory states that all the organism including multicellular organism is the basic unit of life.
Explanation:
Organismal theory was explained by several scientists such as Reichert a morphologist stated that an organism have structured plan; Strasberger a cytologist argues that cells in an organism are connected by cytoplasmic bridges, and Sherrington and Pavlov (neurophysiologists) says cells communicate with each other and co-ordinate with their actions.
Several postulates of organismal theory are as following:
- Some organisms such as fungi are non-cellular and are unable to divide into cellular compartments. plant cells have cytoplasmic bridges between each other called plasmodesmata.
- some of the cells lack some basic components such as red blood cells and nucleus. Cytoplasm in unicellular organisms does not undergo subdivision into cells.
- If any cell is removed from the multicellular organisms, it would require complete life support to be alive.
- Homeostatic control or co-ordinatoin between unicellular or multicellular organism is must to maintain the whole organism.
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